Did you find out the tritium vial size? Merkava at the Candle Power Forums has several sizes available for sale. One for sale link is For Sale: Tritium Vials - CPFMarketPlace - he has other threads in their marketplace, just look around.

No responses to vial size. I've just posted (and doubled, sorry) yugo site replacement using your link source. Am going to have to experiment on the tri-lux. If successful, will post results. Those vials are BRIGHT

don.t know if this helps but i seem to remember a guy over on the falfiles posting about buying/selling? either leds or tritium vials for the trilux. sorry it's been a while read it back when they(trilux's) were cheaper.